Joint Helicopter Command Flying Station (JHFS) Aldergrove is located south of Antrim in Northern Ireland. The flying station adjoins Belfast International Airport and shares the runways but has its own separate facilities and helipad.

JHFS Aldergrove is currently home to 651 Squadron AAC with their Britten-Norman Defender aircraft, and 665 Squadron AAC with their Westland Gazelle AH.1s.

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Aircraft & Squadrons
JHFS Aldergrove is currently a Joint Helicopter Command Flying Station which shares the runways of Belfast International Airport.

It is home to 5 Regiment Army Air Corps with 651 Squadron AAC which operates the Britten-Norman Defender fixed wing aircraft, and 665 Squadron AAC which operates a fleet of Gazelle rotary aircraft.

Since the end of Operation BANNER (Northern Ireland 1969-2007) the Gazelle aircraft continues to support Police Service Northern Ireland operations within the Province. The Regiment also provides Gazelle pilots who deploy on exercise to the British Army Training Unit Suffield (Canada) through 29 (BATUS) Flight Army Air Corps.

History
RAF Aldergrove first opened in 1918 but did not become an operational RAF station until 1925.

During WW2 because of its location it became an important station of RAF Coastal Command in the Battle of the Atlantic. Long-range reconnaissance aircraft were based here to patrol the Eastern Atlantic for U-boats.

After the War, Aldergrove was designated as a dispersal airfield for the RAF's V bomber force in the 1950s. In 1968 23 Maintenance Unit RAF was responsible for the maintenance of McDonnell Douglas F-4 Phantom II's in RAF service, and Aldergrove was also the main servicing and reconditioning station for the English Electric Canberra from their introduction in 1951.

Later, the Army Air Corps were based here with Westland Lynx and Westland Gazelle helicopters as well as de Havilland Canada DHC-2 Beaver aircraft in its joint operations with the RAF's Reconnaissance Intelligence Centre (Northern Ireland); the Beaver was replaced by the Britten-Norman Islander late in 1988.

Aldergrove officially ceased to be an RAF Station on 20 September 2009 and is now home to the Joint Helicopter Force Northern Ireland, which provides Gazelle and Islander aircraft in support of the Police Service of Northern Ireland (PSNI).